package/libdrm: bump version to 2.4.75

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libdrm/libdrm.hash

@@ -1,2 +1,2 @@
-# From https://lists.freedesktop.org/archives/dri-devel/2016-November/125379.html
-sha256 d80dd5a76c401f4c8756dcccd999c63d7e0a3bad258d96a829055cfd86ef840b  libdrm-2.4.74.tar.bz2
+# From https://lists.freedesktop.org/archives/dri-devel/2017-January/131209.html
+sha256 2d5a500eef412cc287d12268eed79d571e262d4957a2ec9258073f305985054f  libdrm-2.4.75.tar.bz2

package/libdrm/libdrm.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBDRM_VERSION = 2.4.74
+LIBDRM_VERSION = 2.4.75
 LIBDRM_SOURCE = libdrm-$(LIBDRM_VERSION).tar.bz2
 LIBDRM_SITE = http://dri.freedesktop.org/libdrm
 LIBDRM_LICENSE = MIT